Parse a convert query answer. Any of src_format, src_value, dest_format, and dest_value may be NULL, in which case that value is omitted.
the storage for the GstFormat of the source value, or NULL
the storage for the source value, or NULL
the storage for the GstFormat of the destination value, or NULL
the storage for the destination value, or NULL
See Implementation
Parse a convert query answer. Any of src_format, src_value, dest_format, and dest_value may be NULL, in which case that value is omitted.